Existing home prices are rising at a rate of 8 percent — much faster than incomes — but that’s nothing compared to the rise in new-home prices, The Wall Street Journal pointed out on Wednesday.

The National Association of Realtors’ chief economist Lawrence Yun said in a news conference on Wednesday that prices were rising too quickly given the disparity with incomes, a troubling sign for the housing market as a whole. But the 8 percent growth in existing home prices seen in March’s economic report isn’t too impressive when compared with prices in the new-home segment.

The price gap between new and existing homes has jumped to 40 percent, the Journal’s Real Time Economics blog noted. That’s partly because consumers have demonstrated a preference for new homes with fewer maintenance fees than old homes. But it’s also thanks to the rising share the priciest new homes are occupying in the segment.

Although homes costing less than $300,000 still hold a slim majority of all new homes sold, the growth sector has been in more luxurious residences. Homes costing $500,000 or more accounted for almost 11% of new homes sold in 2014, up from 8% in 2011.